EUVD-2026-23778

| CVE-2026-6607 MEDIUM
2026-04-20 VulDB GHSA-5h65-jx66-j7p5
Denial Of Service Fastchat
5.5
CVSS 4.0
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CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

2
Analysis Generated
Apr 20, 2026 - 05:26 vuln.today
CVSS Changed
Apr 20, 2026 - 05:22 NVD
5.3 (MEDIUM) 5.5 (MEDIUM)

DescriptionNVD

A security vulnerability has been detected in lm-sys fastchat up to 0.2.36. This issue affects the function api_generate of the component Worker API Endpoint. The manipulation leads to resource consumption. The attack can be initiated remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is c9e84b89c91d45191dc24466888de526fa04cf33. It is suggested to install a patch to address this issue. Commit ff66426 patched this issue in api_generate of base_model_worker.py and did miss other entry points.

AnalysisAI

Resource exhaustion in lm-sys FastChat up to 0.2.36 allows remote attackers to trigger denial of service by sending manipulated requests to the Worker API Endpoint's api_generate function. The vulnerability has publicly available exploit code and is confirmed patched upstream, though the fix in commit c9e84b89c91d45191dc24466888de526fa04cf33 addresses only the primary entry point in base_model_worker.py while missing other vulnerable code paths. …

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EUVD-2026-23778 vulnerability details – vuln.today
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